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Development of a Manipulator Free Mobile Ultrasonic C-Scan System
Key Engineering Materials, 2006Ultrasonic C-scan inspections have been used in various industrial fields. Usually, conventional ultrasonic C-scan systems have several mechanical manipulating axis controlled by a computer or an electronic device. These systems are suitable for the high resolution and inspection quality.
Hyun Cho +4 more
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Encoder Positioning Manual Ultrasonic C-Scan Testing Method and Applications
2021To solve the problems that traditional manual inspection results cannot be visualized and automatic detection equipment is complex and non-maneuverable, a manual ultrasonic C-Scan testing method based on encoder positioning is proposed. By analyzing the characteristics of the ultrasonic A-Scan signal, an acquisition method for ultrasonic A-Scan signal ...
Tianhang Fu, Songping Liu
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C-scan imaging in molten zinc by focused ultrasonic waves
The Journal of the Acoustical Society of America, 2000Ultrasonic images of a small steel object immersed in molten zinc at 600 °C are obtained with high spatial resolution using a focused ultrasonic pulse-echo technique. The focused ultrasonic waves are generated by a spherical acoustic lens which has been machined at the probing end of a clad buffer rod.
, Ihara, , Jen, , Franca
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Screening of Metal Matrix Composites Using Ultrasonic C-Scans
Journal of Composites Technology and Research, 1989Ultrasonic C-scans can be used to find some types of defects in continuous fiber-reinforced metal matrix composites such as boron/aluminum composites. These defects are related to the fatigue behavior and fracture location of each inspected specimen. The C-scan technique determined the relative amount of defects in boron/aluminum composites.
GP Sendeckyj +4 more
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Blind image restoration for ultrasonic C-scan using constrained 2D-HOS
2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221), 2002A new approach is presented to use higher order statistics (HOS) to deconvolve the effects of blurring in ultrasonic C-scans. The quantization effects of the mechanical scan-grid and the conversion of the 1D A-scan into one pixel on the image cause blurring.
Uvais Qidwai, Chi-Hau Chen
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Vibro-Acoustography: Speckle Free Ultrasonic C-Scan
2002In an in vitro experiment the acoustic emission characteristics of broken and intact struts on BSCC valves exhibited different frequency responses and different vibro-acoustography images. The images indicated that the vibration modes of the object could be deduced in addition to the structural integrity of the object.
James F. Greenleaf +2 more
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Neural network-based ultrasonic C-scan imaging of austenitic structures
The Journal of the Acoustical Society of America, 1999Results of new studies of C-scan imaging on austenitic welds, used in conjunction with artificial neural network techniques, are reported. The C-scan technique provides high-resolution images of subsurface zones which are inaccessible by conventional A-scans.
Petre Petculescu, Dorin Ciobanu
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Imaging of the Ultrasonic Velocity and Reflection Properties of Objects by a C-Scan Method
1984A method and imaging system for the measurement of the ultrasonic velocity and reflection properties of objects are described. Some preliminary images of test cylinders and brain specimen are shown and the various imaging difficulties are discussed. The measured velocity values are in agreement with those found in the literature and in the images a ...
K. Tervola +3 more
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"Synthetic axial acquisition" full resolution C-Scan ultrasonic imaging
IEEE Ultrasonics Symposium, 2005., 2006This work relates to efficient and low cost acquisition of beamformer data for C-Scan imaging. In our previously described Directly Sampled In-phase and Quadrature (DSIQ) approach (1), as few as one complex sample per array element is used. In the 'Synthetic Axial Acquisition' (SAA) approach presented here, we take advantage of the fact that we use an ...
Y. Li +3 more
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Ultrasonic C-scan Image Restoration Using Radial Basis Function Network
2004A method for restoration of ultrasonic C-scan images is presented by using a radial basis function network. The method attempts to reproduce the mapping between the degraded C-scan image and the high quality one by training a RBF network. The inputs for training are the sub-images divided from C-scan image of flat-bottom hole of size 3mm and the output
Zongjie Cao +3 more
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